First Principles: A Physicist LitRPG Isekai

Magic resistance has made mages obsolete. Anyone who fights for a living develops a mana resistance skill that breaks magic apart on contact Mages have become cannons in a world of tanks, and their schools are closing. A twenty-two-year-old physicist goes cave diving and comes up somewhere else. The system gives him no class and a skill it can't describe, and points him toward the nearest temple. He doesn't know much about magic yet. He does know how heat and pressure work, and it turns out mana can push on real things. First, though, he has to find that temple. LitRPG with a system and skills. Physics-based magic.